Doorlock



J. O. SOEMER Dec. 1,

DOORLOCK Dec. 1 I J. O. SOEMER DOORLOCK Filed Jan. 11, 1924 2 Shets-Sheat 2 Patented Dec. 1, 19 25.

l UNITED. STATES" PATIENT omen.

Joint o'r'ros onunn, or unwmx, new messy.

' noonnocx.

To all whom it may concern:

Be it known that I, JOHN O'rro solmnn,

a citizen of the United States, residing at Newark, in. the county of Essex and Stfi Imore particularly to a type of lock which can be manipulated to--prevent opening ofadoor from the outside but which invariably responds to pressure tending to openthe door from the inside, this type of lock being commonly referred to as a panic exit lock. r I I I It is the purpose and object of the present invention to reorganize and improve this general type of .lock. Apparatus constructed in accordancmwith the new im provements may be readily and simply attached to doors not previously equipped with such a lock and provides an efiicient form of lock which cannot be tampered with or picked from the outside but which unfailingly releases the door with the exertion of a comparatively light pressure from the inside.

With this and other objects in View, the various features of the invention consist in certain novel features of construction, combinations and arrangements of parts here: inafter described and claimed, the advantages of which will be obvious to those skilled in the art from-the following de scription. g a I I In the accompanying drawings illustrating the preferred form of the invention .7

Fig. 1 represents a sectionin elevation of one embodiment of the improved lock attached to a door, this look being actuated by a pivoted thumb latch; Fig. 2 is a plan view of the construction shown in Fig. 1 with the lock housing shown in section Fig. 3 is an elevation in section of a slightly different form of lock ada ted to be actuated by a rotatable knob; i 4 is a plan of-the construct-ion shown in Fig. 3 with the housing shown in section; Fig. 5 is'a detail illustrating the pivoted latch and strike with which it cooperates; and Fig. 6 is a Application Med January 11,1921, semi at. 5,545,

detail illustrating the slotted pinion adapted to receive the inner end of the actuating blade connected with the cylinder lock.

The illustrated embodiment of the invention, .as shown more particularly in F1 5. 1 to 4 of the drawings, comprises generdl ly a lock housing attached to the inner side of the door and having a spring latch cooperating with a strike attached to'the door casing. A transversely extending bar or similar construction. is connected with the lock in such a manner that pressure exerted downwardly and outwardly upon the bar tends to retractthe latch and permit opening of the door. The locking mechanism is provided either with a rotatable .knob or pivoted thumb latch projecting throu h the door. to the outside and normally ad when actuated to retract the latch and permit opening ofthe door from the outside as well-as inside. The door may be locked I against opening from the outside through a apted cylinder lock mounted upon the outer side of the door and connected with the mechanism, as hereinafter described. When the.

cylinder lock with its operating blade is turned into locking position, retraction of the latch bolt through the outer thumb latch or rotatable knob is prevented. Owing to the design. of the lock mechanism, however, retract-i on of the latch bolt through pressure exerted upon the inside bar or actuatingmember cannot be prevented, asthe operative connections between the outer and inner instrumentalities are separate and independent of one another.

Upon referring to the accompanying drawings, more particularly Fi s. 1 and 2, it will be observed that a lock 1% (generally at 10 issecured to the inside of the oor adjacent the rim through fastening's indicated generally at 12. A latch 14.- projects through the side of the housing and is casing indicated I pivotally supported at 16 in lugs 18 projecting from thehousing. The latch, as will be evident from an inspection of Fig. 5, is connected at one side of the pivot 16 to a sliding bolt 20 surrounded by a coiled spring 22 I which normally tends to move the vpivoted latch into the locking 'osition shown in Fig.

5. The inner ends 0 the latch bolt -is supported for sliding movement betweenthe o I posite legs 24' of an extension 26 and t e operating spring 22 is interposed between a the extension 26 and an enlarged head 28 formed upon the bolt. An abutment plate 30 threadedly connected to the inner endof the bolt, as shown in Figs. 2 and 5, serves to permit its retraction against the pressure of the spring 22. In theconstruction shown in; Fi 1 and 2, the abutment plate 30 is move to the left to retract the latch 14 through arocking dog 32 pivoted in the 1 housing at 34 and havmg an end 36 which 'en ages the lower side of the abutment, as

'cated in Fig. 2. The lower end of the rocking dog is engaged by an actuating arm- 38 pivoted to the housing at 40 and formed integrally with a transverse bar 42 which may extend across the inner side .of the door in a'manner which will be obvious to those skilled in the art. The spring 22 is normally suflicient to maintain the latch 14 in locking' position against the weight of the withdraw the latch 14. The above described construction forms an exceedingly simple and eflicient mechanism for unlatching the door from the inside, which is unfailing in its operation and which cannot be tampered with. In, the construction s own in Figs. 1

and 2, the latch is released om the outside through a thumb latch 42 which may be pivoted at 44 to the escutcheon plate 46.

This thumb latch is provided with a member 48 extending throu h the door and projlecting at its inner en beneath an arm 50. he arm 50 is rotatabl supported at 52 within a lock housing an is connected at its o posite free end with a bell crank lever 54 t rough a link 56. The bell crank lever 54 is provided with a depending arm 58 which engages with the up er portion of the dog 32, as indicated in'l ig. 2. With this construction, a'depression of the thumb latch from the outside raises the arm 50 and rocks the bell crank 54, which in turn rocksthe dog 32 and retracts the latch 14. This portion of the mechanism, which retracts the latch from the outside, is rendered inopera tive through a pinion 60, which is provided at one portion of its periphery with an abutmentor block 62, this abutment or block being designed in one position of the pinion to engage with the surface 64 on the arm 50 and preven't'elevation of the arm. With the abutment in'this osition, the arm 50 and 1 bell crank 54 are ocked agalnst movement which prevents retraction of the latch from the outside. It will be obvious, however, that the retention of these parts in inopera tive position does not interfere with the movement of the dog 32 under the action of the bar 42. The rotation of the pinion from operative to inoperative position and vice verse is accomplished through a small pinion der attached to the outside of the 66 meshing therewith, which is actuated by a blade 68 forming a part of the lock c lin-- It will be evident to those skilled in the art that the lock cylinder may be of any desired form in which the rotation of the blade can only be accomplished by the insertion of a key of particular design. The pinions 60 .and. 66 are so designed and proportioned that a complete rotation of the cylinder blade 68 is required to move the abutment 62 from 0 rative to inoperative osition.

I In the orm of lock shown in igs. 3 and 4, the transverse bar 42 is pivoted at 40 and actuates the dog 32 through an arm 38. This dog through engagement withthe abutment 30 serves to retract the latch bolt 20 and pivoted latch 14. The retraction of the latch .from the outside of the door is accomplished by a rotatable knob 71 having a spindle 72 extending through the door and connected at its inner end with. a tumbler 74. The tumbler 74 upon rotation of the knob in either directionexerts a lateral pressure upon a depending arm 76 and cams the arm-to the left in Fig. 4. This arm, through engagement with the upper'side of the abutment 30, fretracts the latch in a manner which will'be evident. The arm 76 islocked against movement in a direction to retract the latch through a locking arm 78 pivoted in the housing 80 and having a downwardly projecting portion 82 which engages behind a projection 84 u n the arm, as indicated in F g. 4. Norma y the rotation of the knob serves to move the arm 76 to the left, the cam face u n the projection 82 causing it to rise as e arm is moved. Movement of the arm to retract the latch is prevented through the gear 60. with the abutment 62, the latter being moved in one position of the gear into engagement with the upper side of the locking arm .78. With the abutment in this position, elevation of the locking arm is prevented and the knob is ,locked a ainst rotation in a manner to retractthe On the other hand, this construction does not interfere with'the retraction of the latch under the action of the transverse bar 42.

It will be evident from an inspection of Figs. 2, 4 and 5 that the pivoted latch 14 engages and cams into a strike 90 fitted in the adjacent portion of the door jamb. The door jamb is recessed in such a manner that when the door is closed and latched access to the latch" cannot be ained from atch.

the outside The extension '0 the sliding bolt 20 be ond the member 26 is such that the endo the bolt will strike the housing tion .providesa relatively simple and thief proof lock, which may invariably be opened I from the inside by a simple pressure on the operating bar, this pressure also tending to open the door after the latch is released.

While it is preferred to employ the specific construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far ass eciiled in the claims and may be change or modified without departing from the broader features of the invention.

The invention having been described, what is claimed is: I I

1. A look comprising a housing, a sliding latch bolt within the housing, a dog pivoted 'in the housing below the latch bolt, an arm 2. A lock comprising a relatively shallowhousing, a sliding latch bolt supported within thehousing, a dog pivoted in the housing below the latch bolt, a bar release pivoted in the housing below thedog adapted to retract the latch bolt through the dog, an arm extending across the houslng above the latch bolt, a bell crank pivoted in the housing, a

link connecting the arm and bell crank, the a bell crank retracting the latch bolt through engagement with the pivoted dog, a rotating abutment for locking the swinging arm against movement in a direction to retract the latch bolt, and means for moving the arm to retract the latch bolt.

3. A lock comprising a housing, a latch pivoted in the housing, a latch bolt connected to the latch, an arm pivoted in the housing and adapted to be moved upon retraction of the latch, apinion supportedfabove the arm, an abutment carried by the pinion, and means for rotating the pinion to move the abutment into engagement with the arm-v to lock the latter against movement.

4. A lock comprising a housing, a latch pivoted in the housing, a latch bolt connect-.

ed to the latch, an arm pivoted in the housing and adapted to be moved upon retraction of the latch, a pinion supported above the arm, an abutment carried b the pinion, and a second pinion mounted a ove the first mentioned pinion and designed to'move the pinion carrying the abutment approximately one-half'a revolution during a complete revolution of the second pinion.

J. oT'ro SOEMER. 

